%i1) specint(sqrt(t)*%e^(-p*t-a/t),t); Is p positive, negative, or zero? pos; Is a positive, negative, or zero? pos; Is psey positive, negative, or zero? What is "psey"??? This example came from demo(hypgeo); which incidentally may work better if we add assume(a>0); assume(b>0) to the file. RJF